function getParameter(parameter) {  
	var query = window.location.search.substring(1);
	  var vars = query.split("&");
	  for (var i=0;i<vars.length;i++) {
	    var pair = vars[i].split("=");
	    if (pair[0] == variable) {
	      return pair[1];
	    }
	  }
}

function fecha_janela(){
	window.opener = window;
	window.close();
}

function popup(url, width, height){			
	window.open(url, url, "toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=" + width + ",height=" + height);
}